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  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  <!-- alt：图片加载不出来，为图像提供替代文本描述 -->
  <img src="./cat1.jpg" alt="这是一只猫">
  <img src="./dog.png" title="这是一只狗">
  <img src="./cat.jpg" width="100">
  <img src="./dog.png" height="600">
</body>

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